Valve.



W. E. SPENCER.

vALvE. APPLICATION FILED SEPT. 26.1916.

Patented Aug.' 21, 1917.

,y un stra s raauivr orifice.

WILLIAM EDWAnDsrENcER, or srocxronfr, ENGLAND. f

` vALvE.

To all whom t mag/concern:

Be it'known that I, VViLLrAMy EDWARD SPENCER, al subject of the King `of Great reference more particularly to the kind `ofvalve commonly known as clear-bore fullway, or straightway gate-valve, in which the valve proper is formed wedge shaped.

Valves of the kind referred to, as usually made, require to be very l accurately machined to insure liquid-tight joints and are impracticable with fluids at high pressure.

To obviate these disadvantages it has been proposed to provide renewable valve seats made of soft metal, or of asbestos and rubber intimately mixed and hardened by heat and pressure, said seats being somewhat thicker than the seat holder. The latter comprises an oblong metal casing, with undercut apertures for the seating, which latter may partly engage groovesy in the inclined sides of the valve, or the seating maybe entirely secured to metal cheeks positioned in the body of the casing by lugs. l

The object of the present invention is to improve and simplify the construction and arrangement of such valves.

According to the invention the valve casingvis made somewhat after the usual man# ner with a straight through bore. The inclined sides are provided with renewable valve seats which comprise strips of suitable material, such as asbestos or other fibrous material, vulcanite, or soft metal such as white metal, formed with holes to register with the bore of the casing. Said strips are slid into grooves formed to receive them and secured therein by the cover of the casing.

The valve proper is preferably formed of solid metal, the sides of which are inclined to correspond with the angle of the interior walls of the valve casing and said valve is detachably secured to the valve spindle, a T-slot being provided to receive a head theeon when a rising andfalling spindle is use In order that the invention may be clearly accompanying drawings which show the iny ,Specification of Letters lPatent. Patented Aug, 1917. `Application led September 26, 1916. Serial No. 122,231. I

vention carried into effect inthe preferred4 the top part removed.

Fig. 5 shows a front, end and plan view of` the valve proper and Fig. 6 illustrates the renewable face in front and edge view.

The valve casing a is formed with a clear bore b, the ends of the casing having screw threads c or other means to receive the usual connections. The interior of the casing is provided with opposed inclined faces Zand parallel side walls e, in the ends of which, grooves f are formed, whose outer edges constitute continuations of the inclined faces. Sliding within the grooves 7 are the renewable valve seats g, which are preferably formed of asbestos, though other substances may be used such as vulcani-te or white metal.

The seats g are held in place by the valve cap or cover z, which overlaps the edges of said seats as indicated by the dotted line in Fig. 4, said cap or cover, screw-wise engaging the casing and being formed with screw v threads to engage screw threads o n the valve spindle z' after the usual manner.

Referring to Fig. 5, the valve z' is shown as formed from a solid piece of metal, somewhat wedge-shaped in cross-section, the inclination of the sides or faces corresponding approximately to that of the inclined walls cl. Upon the top side of the valve, a slot c is formed, with over-hung sides, to receive the head Z on the spindle t', in a manner such that the spindle can be readily attached to or removed from the valve and when in position can freely rotate.

A handle m is secured to the top of the spindle, by means of which it may be rotated to raise or lower the valve in the usual manner.

The inclination of the valve faces is preferably such, that there is no tendency of the valve to jam or stick however tightly it may be screwed down.

By the above means a full-way clear-bore valve of high efficiency at all pressures is formed ofa Jn'iin'i'mum numberl'of y.parts and at :anangleto Aeaclr'otherly ofiabout i150 and having renewable and independentiplatesfof asbestos lying against each angular face, in combination vvith" a'va-lve of similar afn'Qg-uL larity -free to move laterally and beditself againsts thlesaid Iasbestos 'plates When vlo'vvered, said plates"being held in position by' the vsc'revved ca'p of 'thevalvefas 'set vrforth'.`

2. StraightWay-gate valves compirising'a vai-ve casing' formaawvah affini-1 way here Gfx'is of L'this :patent may-be 'obtainedfor and interior opfposed inclined ffaces; ygrooves on said faces open at the top, asbestos strips in saidgrooves 'formed with openings to registeravith` said bore, a sc'rvved top for said casing adapted to cover the end of said grooves, a screwed spindle formed with an interiorl head, and a solid vvedgefshaped' valve formed With a T-shaped slot' *to1 receive the aforesaid head,y substantially as described.

In Witness whereof I havehereunto -setmy hand in the presence of tvvo Witnesses. f

WILLIAM iiijWiiRDisPENoEpgj Witnesses: l

F. C. PENNINGTON- I4". J. lVIEmiDITH.\

Washington; D. C. 

